24 January 2019 Beam nonuniformity compensating by the programmable spatial shaper for the integration test bed
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Proceedings Volume 11052, Third International Conference on Photonics and Optical Engineering; 110521R (2019) https://doi.org/10.1117/12.2524006
Event: The International Conference on Photonics and Optical Engineering, 2018, Xi'an, China
Abstract
The Integration Test Bed (ITB) is a large-aperture single-beam Nd:glass laser system, built to demonstrate the key technology and performance of the laser drivers. The phase II designed output of the ITB at 1053nm is 18.2kJ with the peak power of 3.6TW. So it is important to keep a flat spatial intensity profile at the end of the system to avoid optical elements damage or small-scale self-focusing. Applying the Liquid Crystal Programmable Spatial Shaper (LCPSS) to compensate the beam non-uniformity related to amplification and transmission is an effective way at present. In this paper, we attempt to pre-compensate the beam nonuniformity by the LCPSS. Experiments were carried out to study the spatial fluence modulation and contrast improvement at the main laser output of the ITB laser facility. The results show that the peak-to-average fluence modulation in the near-field is typically 1.35:1; the contrast is about 0.08, at the designed energy and power, which meet the modulation less than 1.4:1 and the contrast under 0.1 design requirement.
© (2019) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Junpu Zhao, Yue Liang, Sen Li, Zhaoyu Zong, Jun Tang, Wenyi Wang, Ping Li, Runchang Zhao, Fa Zeng, Yanwen Xia, Lin Chen, Bo Chen, Kuixing Zheng, Xiaofeng Wei, and Qihua Zhu "Beam nonuniformity compensating by the programmable spatial shaper for the integration test bed", Proc. SPIE 11052, Third International Conference on Photonics and Optical Engineering, 110521R (24 January 2019); doi: 10.1117/12.2524006; https://doi.org/10.1117/12.2524006
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